When load balancing traffic between two web servers， which of the following technologies provides the LOWEST cost solution？（）

A server failed Thursday evening before the nightly backup. The backup scheme in place was fullbackups 
every Sunday，incremental backups on Monday，Wednesday，and Friday，and differentialbackups on Tuesday，Thursday，and Saturday. 
To fully restore the server，which of the following is theLEAST amount of backup sets required？（）

A server has five hot pluggable SCSI disk drives in a RAID 5 array. The server OS crashed and the server will not boot. The administrator noticed that all of the disk drives have gone offline. 
Which of the following components would MOST likely have caused the problem？（）

The operating system partition on a server is nearly out of space on a Windows 2003 Server. The administrator notices that the file pagefile.sys is taking up nearly 2GB of space. 
Which of the following would BEST resolve this problem？（）